$2175.00 Cylinder Capacity 9.58 cu.in 157 ccm Power Rating 17.8 HP 13.1 kW Bore Diameter 1.97 in 50 mm Stroke 1.57 in 40 mm Weight 8.2 lbs 3930 g Speed Range 1000-7500 RPM Crankshaft 3 Ball bearings Connecting Rod Needle bearings on both ends Oil / Gasoline Ratio 1:50 - 1:80 Mix Ignition 6.0 V-8.0 V Propeller - 2 Bladed 32 x 12 33 x 10, 12 34 x 14 3W 3D Prop Propeller - 3 Bladed 29 x 12 30 x 10. 12 Length 7.3 inches Width 12.5 inches     DOWNLOADS  Dimensions  3W 157 TS CS Bolt Pattern  3W 157, 170Xi B2 Manual  3W 157 TS CS